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pion    音标拼音: [p'ɑɪ,ɑn]
n. ｋ介子

ｋ介子

pion
n 1: a meson involved in holding the nucleus together; produced
as the result of high-energy particle collision [synonym:
{pion}, {pi-meson}]

Meson \Mes"on\, n. [NL., fr. Gr. me`son middle, neut. of me`sos,
a., middle.]
1. (Anat.) The mesial plane dividing the body of an animal
into similar right and left halves. The line in which it
meets the dorsal surface has been called the dorsimeson,
and the corresponding ventral edge the ventrimeson. --B.
G. Wilder.
[1913 Webster]

2. (Physics) An elementary particle made up of two quarks; a
hadron having a baryon number of zero; any hadron other
than a baryon. Mesons are bosons with integral values of
spin, having a mass intermediate between those of the
electron and a nucleon; they may have positive or negative
charges, or may be neutral. Mesons are of three types: the
{pion} ([pi]-meson), {kaon} (K-mesons), and
{[eta]-mesons}.
[PJC]

{mu meson} (Physics) the former name for the {muon}, a
particle which is not a true meson[2]. The term is no
longer used in technical literature, except historically.
[PJC]


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  • Pion - Wikipedia
    In particle physics, a pion ( ˈ p aɪ ɒ n , PIE-on) or pi meson, denoted with the Greek letter pi (π), is any of three subatomic particles: π 0, π +, and π − Each pion consists of a quark and an antiquark and is therefore a meson Pions are the lightest mesons and, more generally, the lightest hadrons They are unstable, with the
  • PION Definition Meaning - Merriam-Webster
    The meaning of PION is a meson that is a combination of up and down quarks and antiquarks, that may be positive, negative, or neutral, and that has a mass about 270 times that of the electron
  • Pion - Leader in Next-Gen Pharma Development
    Pion stands behind the science Unique Instruments and Services that Help Scientists Make Informed Decisions About Drug Formulation from R D to Manufacturing Contact Us
  • Pion - Simple English Wikipedia, the free encyclopedia
    A pion, π meson, or pi meson is a type of meson, made of one up quark (u) and one down antiquark (d̅) Mesons are a category of subatomic particles, which are composed of one quark, and one antiquark There are six types of quarks (called flavours) but only two flavours go together to make a pion
  • PION Definition Meaning | Dictionary. com
    Pion definition: the first meson to be discovered: it has spin 0 and may be positively or negatively charged or neutral; charged pions decay into a muon and a neutrino or antineutrino π See examples of PION used in a sentence
  • PION definition and meaning | Collins English Dictionary
    Physics a meson having a positive or negative charge and a rest mass 273 13 times that of the Click for English pronunciations, examples sentences, video
  • Pion - Scientific Lib
    In particle physics, pion (short for pi meson) is the collective name for three subatomic particles: π 0, π + and π − Pions are the lightest mesons (excluding the misnamed "Mu Meson" or muon) and play an important role in explaining low-energy properties of the strong nuclear force
  • Pion Explained
    The pion is one of the particles that mediate the residual strong interaction between a pair of nucleons This interaction is attractive: it pulls the nucleons together Written in a non-relativistic form, it is called the Yukawa potential The pion, being spinless, has kinematics described by the Klein–Gordon equation
  • Pion - (College Physics I – Introduction) - Vocab . . . - Fiveable
    A pion is a type of meson that mediates the strong nuclear force between nucleons Pions come in three varieties: positively charged ($\pi^+$), negatively charged ($\pi^-$), and neutral ($\pi^0$)
  • DISCOVERY OF THE PION --- 1947 - University of Pittsburgh
    If the pion does play a special role, it is because it is the lightest strongly interacting particle More than anything else, the 1947 discoveries made physicists realize that the subnuclear world was more complex than had been suspected by looking at everyday nuclei
  • pion - daviddarling. info
    The pion is the lightest type of meson Pions, also called pi-mesons, are composed of up quarks, down quarks, and their anti-quark counterparts Pions of charge +1, -1, and 0 are denoted π +, π –, and π 0, respectively
  • pion | Encyclopedia. com
    pion (pī´ŏn) or pi meson, lightest of the meson family of elementary particles The existence of the pion was predicted in 1935 by Hideki Yukawa , who theorized that it was responsible for the force of the strong interactions holding the atomic nucleus together
  • Pion - Wikiwand
    In particle physics, a pion or pi meson, denoted with the Greek letter pi, is any of three subatomic particles: π0, π+, and π− Each pion consists of a quark an
  • Pion Definition Meaning - YourDictionary
    Pion definition: Any of the three least massive mesons, having a positive, neutral, or negative electric charge The charged pions have a mass 273 times that of an electron and a mean lifetime of 2 6 × 10 −8 second, and the neutral pion has a mass 264 times that of an electron and a mean lifetime of 8 4 × 10 −17 second
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